Created
June 14, 2015 22:27
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web audio api サンプル1
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<!DOCTYPE html> | |
<html> | |
<head lang="ja"> | |
<meta charset="UTF-8"> | |
<title>test</title> | |
</head> | |
<body> | |
<form> | |
<input type="button" value="start" onclick="startSound()"> | |
<input type="button" value="stop" onclick="stopSound()"> | |
</form> | |
<script type="text/javascript"> | |
var context;// ベースとなるコンテキスト | |
window.addEventListener('load', init, false); | |
function init() { | |
try { | |
// Fix up for prefixing | |
window.AudioContext = window.AudioContext||window.webkitAudioContext; | |
context = new AudioContext(); | |
} | |
catch(e) { | |
alert('Web Audio API is not supported in this browser'); | |
} | |
} | |
init(); | |
var osciillatorNode; | |
function startSound() { | |
//音の発生源 | |
osciillatorNode = context.createOscillator(); | |
//音の出力 | |
var audioDestinationNode = context.destination; | |
//音の発生源を音の出力装置に接続! | |
osciillatorNode.connect(audioDestinationNode); | |
//音を鳴らす | |
osciillatorNode.start = osciillatorNode.start || osciillatorNode.noteOn; //互換対応 | |
osciillatorNode.start(); | |
} | |
function stopSound() { | |
//音を止める | |
osciillatorNode.stop(); | |
} | |
</script> | |
</body> | |
</html> |
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